Wrench.



A. G. HUNTER.

WRENCH.

APPLICATION FILED rum, 1914.

Patented Dec. 8, 1914.

104 awe/M01 M r/m SQlQwZMA/k.

/O 7 a 0 a N a 22 01%. ,gm MW n15 NORRIS PETERS CO PHOTOVLITHD. wAv

ARTHUR G. HUNTER, OF SHERMAN, TEXAS.

WRENCH.

Application filed February 7, 1914.

T 0 all whom it may concern Be it known that I, ARTHUR G. HUNTER, acitizen of the United States, residing at Sherman, in the county ofGrayson and State of Texas, have invented certain new and usefulImprovements in Wrenches, of which the following is a specification.

This invention pertains to wrenches of that class adapted for use inturning nuts, and relates particularly to mechanism whereby the slidingjaw thereof may be approximately quickly adjusted and securely lookedupon the shank, and subsequently moved into close and accurate positionwith respect to a nut for gripping the same.

Another object of the invention is the provision of a simple attachmentwhich, when mounted upon the shank of said wrench adapts it for use inturning pipes and rods; whereby the gripping power may be applied withthe maximum efliciency and the minimum risk of crushing, superficiallyabrading, or otherwise injuring the article grasped.

This invention is designed particularly to improve the type of wrenchheretofore invented by me and embodied in a patent dated July 25th,1911, No. 999,167. In its use I have found that successful operationdepends to a very great extent on the secure locking, adjustment andrelease of the sliding jaw. In my patent above named is shown a lockingmechanism pivotally secured to a movable yoke,-which is objectionable.

The principal aim therefore of the present invention is to overcomethese inherent obj ections and to this end the invention comprises alocking device and movable yoke formed of one piece. In addition to thisimprovement it also embodies a simple and efiicient pipe grippingattachment.

By the special construction of parts hereinafter described and claimed,as well as by the general combination, arrangement and cooperation ofthe elements entering into the mechanism as a whole, is devised a wrenchwhich will operate with equal efficiency on either nuts or pipes ofvarious sizes.

In the accompanying drawings, Figure l is a longitudinal front edge viewof awrench constructed according to my invention. Fig. 2 is a side viewof the same. Fig. 3 is a rear Specification of Letters Patent. PatentedDec. 8, 1914.

Serial N0. 817,321.

edge view. Figs. 4 and 5 are views of the pipe gripping attachment.Figs. 6 and 7 are views of the carriage. Figs. 8 and 9 are views of themovable yoke removed from the carriage.

Referring now to the drawings, it will be seen that my improved wrenchcomprises, essentially, a primary fixed jaw l,a shank 2, and a secondarysliding jaw 3. The jaw 1 is formed integral with the forward terminal ofthe shank, while the secondary jaw 3 is mounted for sliding movementlongitudinally of the shank, adapting it in practice to cooperate withthe jaw 1 for operating upon a nut or the like. In the front edge of themovable jaw 3 is provided a slot 4:, intersected by alining apertures 5in which is mounted an adjusting screw 6 having threaded engagement:with a knurled disk 7 thereon that is confined within the slot in thejaw.

Upon the rear edge face of the shank 2, and extending longitudinally ofthe latter for about half of its length are formed transversely disposedratchet teeth 8, the forward faces of which are adapted in practice forengagement by coincident teeth 9, formed upon an inner end face of amovable yoke 10, that is carried by a rectangular shaped carriage 11,which is slidably mounted upon the shank 2, and extending forwardlytherefrom is anextension 11, in which the adjusting screw 6 is secured.The movable yoke 10 is formed with a projecting finger lug 10, betweenwhich, and the forward end of the carriage is mounted a coiled spring12, the latter serving to normally sustain the teeth 9 of the movableyoke 10 in engagement with the teeth 8 in the shank, the carriage isperforated at 11, to receive the spring 12, thus forming a seat for oneend thereof upon the edge face of shank 2 and I to prevent anypossibility of the spring becoming detached from between the carriageand the said yoke. In the inner edge of the extension 11 is provided atransverse slot or notch 11", in which the projecting lug 10, of themovable yoke is fitted, retaining it in position on the carriage 11.

The pipe attachment embodied in my invention as shown in Figs. 4 and 5consists of a cross-sectionally fiat jaw 13, bifurcated at its rear endto straddle the shank 2, whereby the arms 13*, formed by thebifurcations are arranged in planes at either side of the shank andthere securely clamped adjacent to the inner edge of the jaw 1, by meansof a thumb bolt 14; the width of this jaw is equal to that of the fixedjaw of the wrench and its operative face is toothed or serrated; thesliding jaw 3 being adjusted to suit the size of the pipe to be operatedupon enables the convenient gripping and turning of the same.

When it is desired to use the wrench the primary adjustment ofthesliding jaw may be obtained by the operator pressing on the fingerlug 10 of the movable yoke 10,'to move the latter out of engagement withthe teeth 8, the operator can now move the jaw 3 in either direction onthe shank 2. After precise details herein set forth, inasmuch as minorchanges in the form, proportion, and

exact manner of assemblage of the parts may be made without departingfrom the spirit of the invention.

' toothed locking portion in the opposite end of the yoke for engagingtheyteeth in the shank, means for adjustably connecting the movable jawand carriagetogether, and an expansion spring interposed between theyoke and the shank for sustaining the yoke in engagement therewith. I Intestimony whereof I affix my signature in presence of two witnesses.

\ ARTHUR e. HUNTER, WVitnesses: v I I B. L; McArnn,

CHARLES, Scnnncnn.

Copies of this patent may be obtained for five cents each, by addressingthe commissioner of Patents.

' Washington, 1L0,

